Method and jig for forming pattern using magnetic ink and magnetic force

ABSTRACT

The present invention relates to a method and a jig for forming a pattern, the method and the jig being capable of realizing various and unique pattern designs due to magnetic particles included in the magnetic ink being distributed in various densities according to intensity of the magnetic force. Disclosed is a method and a jig for forming a pattern by using magnetic ink and magnetic force, the method including: preparing a jig which generating magnetic force, applying magnetic ink on a surface of a substrate to form a print layer, disposing the substrate configured with the print layer above the jig, forming a magnetic pattern on the print layer by applying magnetic force generated from the jig, and drying the print layer.

CROSS REFERENCE TO RELATED APPLICATION

The present application claims priority to Korean Patent Application No.10-2017-0170491, filed Dec. 12, 2017, and Application No.10-2018-0077295, filed Jul. 3, 2018, the entire disclosures of which areincorporated herein by reference in their entirety.

BACKGROUND OF THE INVENTION Field of the Invention

The present invention relates generally to a method and a jig forforming a pattern using magnetic ink and magnetic force. Moreparticularly, the present invention relates to a method and a jig forforming a pattern, the method and the jig being capable of realizingvarious and unique pattern designs due to magnetic particles included inthe magnetic ink being distributed in various densities according tointensity of the magnetic force.

Description of the Related Art

As a technique related to a method of forming a pattern using magneticink, “a pattern forming method on a substrate using magnetic ink” isdisclosed in Korean Patent Application Publication No. 10-2016-0127238(hereinafter, referred to as ‘related art’).

The related art is a technique related to a method of forming a patternon a substrate by using magnetic ink, the method including applyingpaint in which magnetic powders are mixed on a surface of a substrate,disposing at least two magnetic pads on the opposite surface of thesubstrate in a stacked manner such that the magnetic powders included inthe paint form a pattern due to a magnetic field of the stacked magneticpads, and curing the patterned paint.

In the related art, at least two anisotropic magnetic pads are stackedin various ways such that patterns such as a lattice, a diamond, a wave,and so on can be easily realized. In addition, a concentric pattern canbe realized by rotating the stacked magnetic pads while the patterns areformed.

However, it is difficult to realize various patterns of design byoverlapping or rotating two or more magnetic pads. Thus, it is difficultto meet the needs of consumers who want products with individual andunique designs that are difficult to find in ready-made products, orthose who want products with differentiated designs from those of othercompanies.

DOCUMENTS OF RELATED ART

(Patent Document 1) Korean Patent Application Publication No.10-2016-0127238, entitled “pattern forming method on substrate usingmagnetic ink”; and

(Patent Document 2) Korean Patent No. 10-1190539, entitled “coating filmhaving pattern and method of manufacturing thereof”

SUMMARY OF THE INVENTION

Accordingly, the present invention has been made keeping in mind theabove problems occurring in the related art, and the present inventionis intended to propose a method and a jig for forming a pattern, themethod and the jig being capable of realizing various and unique patterndesigns (a decorative plate, a decorative film, a pattern on a containerfor products, etc., which will be described later as an applicationrange of the present invention) by using magnetic ink and magneticforce.

In order to achieve the above object, there is provided a method offorming a pattern by using magnetic ink and magnetic force, the methodincluding: preparing a jig, which generates magnetic force; applyingliquid magnetic ink including chromatic color magnetic particles on asurface of a substrate to form a print layer; disposing the substrateconfigured with the print layer above the jig; forming a magneticpattern on the print layer by applying magnetic force generated from thejig; and drying the print layer, wherein the jig used at the preparingof the jig is configured with a magnetic plate having a contour portionformed on an upper surface thereof in a relief pattern in order togenerate a variation of a magnetic flux density applied from a printlayer, at forming of the magnetic pattern, an intensity of the magneticforce density to be applied to each coordinate position on the printlayer varies according to a distance difference between a surface of thecontour portion and the print layer whereby a distribution of themagnetic particles in the magnetic ink is controlled, and at the dryingof the print layer, the ink is dried and cured such that thedistribution of the magnetic particles having chromatic color is formedto be a desired pattern.

In an embodiment of the present invention, the magnetic particles of themagnetic ink may be selected from the group consisting of aferromagnetic substance, a paramagnetic substance, a soft ferrite, ametallic magnetic substance, a non-metallic magnetic substance, andmixtures thereof, and one or more magnetic substances having desiredcolor to be expressed for the pattern may be used as the magneticparticles.

After the drying of the print layer, the method according to the presentinvention may further include: forming a UV pattern layer on an oppositesurface of the substrate to realize a pattern shape; depositing a metalor a metal oxide on a surface of the UV pattern layer to form a thincolor layer thereon; coating a surface of the color layer with aprotection layer for covering the rear and for protection; and cuttingthe result undergoing the coating along a desired shape of an endproduct.

Meanwhile, a jig for forming a pattern by using magnetic ink andmagnetic force according to the present invention is to apply magneticforce to a print layer, which is formed by applying magnetic ink on asurface of a substrate, to form a magnetic pattern, the jig including: amagnetic plate having a contour portion, which is formed on an uppersurface thereof in a relief pattern, and applying magnetic force on aprint layer, wherein an intensity of the magnetic force to be applied tothe print layer varies according to a distance difference between asurface of the contour portion and the print layer such that a magneticpattern is formed on the print layer.

In an embodiment of the present invention, the magnetic plate mayinclude: an iron plate configured with the contour portion at an uppersurface thereof, and receiving magnetic force and thus having magnetism;and a magnet configured as a magnet (permanent magnet or electromagnet),and contacting with the iron plate below the iron plate and transmittingthe magnetic force to the iron plate.

In an embodiment of the present invention, the jig may be provided witha spacer to keep a space between the magnetic plate and the print layer,and the spacer may be configured as a column or a square frame, mountedon an edge of an upper surface of the magnetic plate.

According to a method and a jig for forming a pattern by using magneticink and magnetic force of the present invention, an intensity of themagnetic force applied to the magnetic ink applied to a substrate isvaried by the jig to correspond to a pattern shape to be implementedsuch that it is possible to easily realize various and unique patterndesigns by a simple process and method in which various complex colorsand patterns are formed on a surface of a product made of a syntheticresin, which can be applied with magnetic ink, such as a decorativeplate, a decorative film, etc.

BRIEF DESCRIPTION OF THE DRAWINGS

The above and other objects, features and other advantages of thepresent invention will be more clearly understood from the followingdetailed description when taken in conjunction with the accompanyingdrawings, in which:

FIG. 1 is a photograph showing cell phone case products manufacturedaccording to a method of forming a pattern by using magnetic ink andmagnetic force, according to the present invention;

FIG. 2 is a photograph showing a decorative film in whichthree-dimensional shading patterns are variously expressed on a plane bythe method of forming a pattern by using magnetic ink and magneticforce, according to the present invention;

FIG. 3 is a photograph showing decorative film products manufactured bythe method of forming a pattern by using magnetic ink and magneticforce, according to the present invention;

FIG. 4 is a photograph showing film sticker products manufactured by themethod of forming a pattern by using magnetic ink and magnetic force,according to the present invention;

FIG. 5A is a process flow diagram of the method of forming a pattern byusing magnetic ink and magnetic force, according to an embodiment of thepresent invention;

FIG. 5B depicts cross-sectional views illustrating the process steps ofFIG. 5A;

FIG. 6 is a cross-sectional view illustrating a mounted state of a jigused in a method according to an embodiment of the present invention, inwhich the jig is configured as a simple relief of an engraved andembossed structure;

FIG. 7A is a cross-sectional view illustrating a mounted state of a jigused in a method according to an embodiment of the present invention, inwhich the jig is configured to express a face of a person in threedimensions by engraving and by the engraved depth;

FIG. 7B is a cross-sectional view illustrating a mounted state of a jigused in a method according to an embodiment of the present invention, inwhich the jig is configured to express a face of a person in threedimensions by embossing and by the embossed depth;

FIG. 8 is a cross-sectional view illustrating an assembled structure ofa jig and a substrate used in a method according to an embodiment of thepresent invention, in which the substrate is supported by spacers to bedisposed above the jig so as to be spaced from the jig for as apreparation for a pattern forming process;

FIG. 9A is a process flow diagram illustrating a method of manufacturinga product by using a single magnetic pattern forming process, accordingto the present invention;

FIG. 9B depicts cross-sectional views illustrating the process steps ofFIG. 9A;

FIG. 10A is a process flow diagram illustrating a method ofmanufacturing a product by performing magnetic pattern forming processtwo times, according to the present invention; and

FIG. 10B is an exemplary cross-sectional view illustrating a doublecolor pattern-resulting product manufactured by performing two times ofmagnetic pattern forming process of FIG. 10A.

DETAILED DESCRIPTION OF THE INVENTION

Hereinbelow, preferred embodiments of the present invention will bedescribed in detail with reference to accompanying drawings. It shouldbe understood that the shape and size of the elements shown in thedrawings may be exaggeratedly drawn to provide an easily understooddescription of the structure of the present invention.

FIG. 1 is a photograph showing cell phone case products manufacturedaccording to a method of forming a pattern according to the presentinvention; FIG. 2 is a photograph showing a decorative film in whichthree-dimensional shading patterns are variously expressed on a plane bythe method of forming a pattern according to the present invention; FIG.3 is a photograph showing decorative film products manufactured by themethod of forming a pattern according to the present invention; and FIG.4 is a photograph showing film sticker products manufactured by themethod of forming a pattern by using magnetic ink and magnetic force,according to the present invention.

Referring to FIGS. 1 to 4, it is possible to apply a method of forming apattern by using magnetic ink and magnetic force of the presentinvention to manufacture of various articles used to protect or beautifyproducts, the articles being exemplified as a housing and an exteriorcase for various mobile devices, a case for home appliances, adecorative plate/sheet, a decorative film, a body and a lid for variouscontainers such as a cosmetic container, etc. In particular, byperforming the forming method which is easy to process, it is possibleto express an original design pattern, which has conventionally beendifficult to implement. In addition, according to the method of forminga pattern of the present invention, it is possible to reduce the numberof process steps and process time for forming a designed pattern, and toimprove the production yield.

FIG. 5A is a process flow diagram of the method of forming a pattern byusing magnetic ink and magnetic force, according to an embodiment of thepresent invention; and FIG. 5B depicts cross-sectional viewsillustrating the process steps of FIG. 5A.

As shown in FIGS. 5A and 5B, the process of the method of forming apattern by using magnetic ink and magnetic force of a jig according toan embodiment of the present invention includes jig preparing step S10,magnetic ink applying step S20, substrate disposing step S30, magneticpattern forming step S40, and performing drying step S50. The magneticink used in the present invention includes small magnetic particleshaving chromatic color. The magnetic particles are fine particles whichmove in a liquid ink by being attracted to an external magnetic force,such as fine particles having a magnetic property, which are moved bymagnetic force in a liquid ink under the influence of a magnetic force.Alternatively, a substance may be used as the magnetic particles as longas the substance is attracted by magnetism and moves in a liquid ink,like iron particles with small diameters (several to several hundreds ofμm) in chromatic color.

In addition, it is possible that two or more kinds of fine magneticparticles and iron particles having different particle diameters and/ordifferent magnetisms are used for the chromatic color.

At the jig preparing step S10, a jig 10 generating magnetic force isprepared for forming a shape to be formed.

At the jig preparing step S10, the jig 10 according to the embodiment ofthe present invention may be provided as one among various structuresaccording to a shape of a pattern to be formed, work environment, etc.

FIGS. 6, 7A, 7B, and 8 show such various structures of the jig preparedat the jig preparing step S10. FIGS. 6, 7A, and 7B show cross-sectionalviews of a structure of the jig 10 according to embodiments of thepresent invention, and FIG. 8 shows that a spacer is provided at the jigsuch that a substrate 20, which is provided with a print layer 30configured by applying the magnetic ink, is fixed.

The jig 10 used at the jig preparing step S10 according to the presentinvention is configured with a magnetic plate 12 having a contourportion 11 formed on a surface thereof in a relief pattern.

When a simple pattern is to be realized, it is possible that the contourportion 11 of the jig 10 is simply configured as an engraved andembossed structure as shown in FIG. 6.

However, when a fine and detailed relief is to be realized such asexpressing saturations, three-dimensional effects, and shadows ofpatterns to be formed on products, it is required that each coordinateon the contour portion 11 is configured to have an individual depth asshown in FIGS. 7A and 7B.

The plate-shaped magnetic plate 12 is configured as a permanent magnetor an electromagnet, and approaches the print layer 30 which will bedescribed later, and then generates magnetic force. Here, as shown inFIGS. 6 and 7A, the magnetic plate 12 may be configured with the contourportion 11 directly. Alternatively, as shown in FIG. 7B, the magneticplate 12 may be configured with a magnet 12 b at one surface thereof andreceives magnetic force, and with an iron plate 12 a at an oppositesurface thereof, the iron plate 12 a facing the substrate to generatethe magnetic force and being configured with the contour portion 11.

Meanwhile, the contour portion 11 may be configured in various shapescorresponding to a shape to be implemented on products.

The contour portion 11 is configured to have a three-dimensional effectby a relief method. Here, the contour portion 11 includes an engraved orembossed shape on an upper surface of the magnetic plate 12, or acombination thereof.

In order to form a repetitive simple pattern, the contour portion 11 ofthe jig may be configured with a structure in which concavities andconvexities are simply repeated as shown in FIG. 6.

Alternatively, as shown in FIGS. 7A and 7B, the contour portion 11 ofthe jig may be configured as a face shape of a specific person in a halfthree-dimension. It should be understood that various shapes such as ananimal, a plant, a building, an artwork, etc. may be configured in threedimensions instead of the face shape of the person.

As described above, in order to form a shape of the contour portion toimplement the present invention, as in the case of the jig structure ofFIG. 7A, the contour portion 11 may be formed directly on the uppersurface of the magnetic plate 12 by mechanical machining such asnumerical control (NC) machining, grinding, etc. Alternatively, as inthe case of the lower structure of the jig of FIGS. 7B and 8, thecontour portion 11 may be configured on the iron plate 12 a attached tothe separate magnet 12 b (permanent magnet or electromagnet).

As shown in FIG. 7A, in the case of using a permanent magnet as themagnetic plate 12, in order to form the permanent magnet on the contourportion 11, a method is performed in which ferrite powders are put intoa mold and then sintered. Specifically, according to the method ofmanufacturing the magnetic plate having the contour portion, the ferritepowders are sintered to manufacture a ferrite plate and exposed tostrong magnetism by advancing an electromagnet, etc. toward the ferriteplate such that the ferrite plate is magnetized beyond a threshold whichis to be restored against magnetic force whereby the ferrite platebecomes the magnetic plate. Accordingly, the ferrite plate ismanufactured as the magnetic plate 12 having a desired contour portionin the present invention. Here, it is preferable to fabricate athree-dimensional shape corresponding to the contour portion 11 on themold for the sintering process in advance to manufacture the magneticplate 12 having the contour portion 11.

As another method of forming the contour portion on the permanent magnetprovided as the magnetic plate, a surface of the permanent magnetprovided as the magnetic plate is directly machined to manufacture a jigitself having a contour portion thereon. Here, the ferrite used to formthe permanent magnet, which is provided as the magnetic plate andcapable of being machined, may be made of Mn—Zn or Ni—Zn ceramicmagnetic material, or a semiconductive ceramic.

In the case of forming the contour portion on the iron plate 12 a andattaching the iron plate 12 a to the magnet 12 b to configure themagnetic plate 12 as shown in FIGS. 7B and 8, the magnet 12 b thatpermeates magnetic force on the iron plate 12 a may be provided as apermanent magnet or an electromagnet. In the case of changing thecontour portion mold, it is preferable to use an electromagnet as themagnet 12 b because the iron plate 12 a is easily separated from themagnet 12 b after cutting off a current supply.

As described above, in the case of the magnetic plate 12 which isconfigured with the iron plate 12 a and the magnet 12 b, with respect ofconfiguring the contour portion 11 on an upper portion of the iron plate12 a, machining the contour portion by a method such as casting orcutting may be easy to perform compared to machining a contour on themagnet. In addition, it is possible that only the iron plate 12 a isreplaced with another one and the replacement is attached to the magnet12 b during the process such that a process for forming a pattern withvarious shapes is performed quickly, and it is advantageous from theviewpoint of lowering the manufacturing cost of the jig as compared withthe jig constituted entirely by magnets.

Meanwhile, as described above, in the jig 10, which can be variouslyembodied according to the present invention, an intensity of themagnetic force applied from the magnet plate 11 to the print layer 30varies according to a distance difference between a surface of thecontour portion 11 and the print layer 30 which is applied on thesubstrate but not cured.

That is, a surface of the contour portion 11 located near the printlayer 30 exerts a relatively strong magnetic force on the print layer30, and a surface of the contour portion 11 located farther away fromthe print layer exerts a relatively weak magnetic force on the printlayer 30. Accordingly, a color density of the magnetic particlesexpressed by adjusting a scattering degree of the magnetic particlesdistributed on the print layer 30 is adjusted whereby it is possible toexpress a pattern shape in which the color density of the magneticparticles to be expressed is adjusted.

As described above, the difference in the intensity of the magneticforce applied to each coordinate position on the print layer 30 in thecontour portion 11 of the magnetic plate 12 varies depending on thedifference in the distance between the surface of the contour portion 11and the print layer 30. However, when constructing the enclosure of thejig as a chamber or further constructing the structure of the jig, amethod may be employed in which a contour space S is in a vacuum stateor composed of an inert gas. The method will provide a processenvironment where the permeability, in which a magnetic flux of thecontour portion 11 of the jig 10 reaches the magnetic particles in theprint layer 30, differs from that of the atmospheric environment.

In addition, it is possible that a liquid substance capable of raisingand lowering the permeability in the contour space S is distributed inthe contour space S, and such a method may be utilized as anothertechnique for realizing the present invention to more finely express achromatic color density of the pattern such as color density, shade,etc. according to a depth difference of the relief. Furthermore, it ispossible that the maximum depth of the contour space S in the magneticplate may be lowered, and such a method may be utilized as anothertechnique for realizing the present invention to manufacture the entirethickness of the magnetic plate 12 thinner.

The technical background for the utilization of the technique of thepresent invention is to consider and utilize a natural phenomena wherethe magnetic flux reaching the magnetic particles in the print layer isproportional to the square of the separated distance and inverselyproportional to the permeability.

Meanwhile, in the present invention, in order to operate in a state inwhich the print layer 30 and the magnetic plate 12 are fixed to eachother as shown in FIGS. 7A and 7B, it is preferable that an align pin APis fixed to the edge of the magnetic plate 12 in an erect state, and theprint layer 30 is provided with an align hole AH for fitting and fixingthe align pin AP therethrough such that it is possible to perform apattern forming process in a state where the print layer 30 is fixed tothe magnet plate 12. As described above, in the case that the printlayer 30 has the align hole AH, an unnecessary portion of the productundergoing the pattern forming process may be finished by a subsequentprocess of cutting along a cutting line CL according to a method such aspress blanking.

The fixing method using the align pin AP and the align hole AH may bereplaced with other fixing structures of the related arts which arealready known to those skilled in the art. For example, although notshown in the accompanying drawings, the print layer 30 may be fixed tothe magnetic plate by a clip, or the print layer 30 may be spread by aplurality of robot fingers provided on a robotic arm or by an adsorptiontype-robotic arm such that the pattern forming process using themagnetic force of the present invention may be performed.

Meanwhile, with respect to configuring the jig 10 in the presentinvention, a spacer 13 may be provided to keep a predetermined distancebetween the magnetic plate 12 and the print layer 30 as shown in FIG. 8.The spacer 13 may be implemented as multiple columns disposed to bespaced apart from each other by a predetermined distance on an uppersurface of the magnetic plate 12 as shown in a cross-sectional area inFIG. 8. Alternatively, instead of the multiple columns, the spacer 13may be implemented as a form of a square frame supporting the entireedge of the magnetic plate. In the case of the multiple columns as thespacer 13, it is preferable that the multiple columns are adjustable inheight, and such height adjustment may be implemented by a threadengagement such as a bolt-nut coupling.

The spacer 13 may be fitted with the align pin AP provided on themagnetic plate 12 and fixed. It is desirable that the spacer 13 is madeof a non-magnetic material to avoid a magnetic effect on the print layer30.

In addition to the above-described structure, the spacer 13 may beprovided with a variety of devices interposed between the magnetic plate12 and the print layer 30 to maintain the distance thereof.

Hereinafter, the method of forming a pattern by using magnetic ink andmagnetic force according to the embodiment of the present invention willbe described subsequently with reference to FIGS. 5A and 5B again.

At the magnetic ink applying step S20, the magnetic ink is applied on asurface of the substrate 20 to form a print layer 30.

Here, the substrate 20 may be made of a synthetic resin film. It ispreferable that the substrate 20 may be made of a film material selectedfrom the group consisting of polymethyl methacrylate (PMMA),polycarbonate (PC), polyethylene terepthalate (PET), polyurethane (PU),thermoplastic polyurethane (TPU), polypropylene (PP), and polyvinylchloride (PVC), which are excellent in transparency. In addition to theabove-described synthetic resin film, various kinds of materials andshapes may be applied to the substrate 20 depending on products on whicha pattern is to be implemented.

The magnetic ink applying step S20 may be performed by the silk printingmethod. In addition, the magnetic ink applying step S20 can be performedby various known methods such as spraying method, gravure printingmethod, offset printing method, etc., in which the magnetic ink isapplied to the substrate to form the printing layer.

With respect to the magnetic ink, a transparent liquid material may beused as a base material of the ink composition of the magnetic ink suchthat the print layer is formed in not only one layer but also two ormore layers. In addition, when forming the print layer in multiplelayers as described above, it is possible that different magnetic inksare used for each print layer such that the multiple layers areexpressed in multicolor when viewed. In addition, it is possible thatlight color is applied to the outer layer of the multiple layers so asto project light such that colors of the multiple layers seem to bemixed.

At the substrate disposing step S30, the substrate 20 formed with theprint layer 30 is disposed above the jig 10. The substrate 20 is fixedto be disposed above the jig 10 by using an additional clamping device.Here, it is preferable that the substrate 20 is disposed in which thesurface on which the print layer 30 is formed is located at the upperside.

At the magnetic pattern forming step S40, the magnetic force generatedfrom the jig 10 is applied to the print layer 30 formed with thesubstrate 20 to form the magnetic pattern. By applying the magneticforce to the print layer 30, the magnetic particles included in themagnetic ink are distributed in various densities according to anintensity of the magnetic force, whereby the magnetic pattern is formedon the print layer 30.

That is, on the print layer 30, the magnetic particles are distributedin high density on a portion where the magnetic force is stronglyapplied by the jig 10, and the magnetic particles are distributed in lowdensity on a portion where the magnetic force is weakly applied by thejig 10, such that the difference in color density occurs due to thedistribution of the magnetic particles on print layer 30. Accordingly, apattern shape is formed on the print layer 30 due to the difference incolor density, the pattern shape being capable of expressing colordensity and shade.

At the magnetic pattern forming step S40, the time for the print layer30 to be exposed to the magnetic force is appropriately set by repeatedexperiments for realizing the present invention depending on anintensity of the magnetic force (magnetic flux density) applied by thejig 10, characteristics of the magnetic ink (curing time of the ink,grain sizes and magnetism of the magnetic particles), and so on.

At the performing drying step S50, the print layer 30 formed with themagnetic pattern is dried. In order to dry the print layer, putting thesubstrate 20 into a drying chamber 70 at high temperature, drying byultraviolet light, natural drying, etc. may be utilized depending oncharacteristics of the magnetic ink.

The resulting product 80 undergoing the performing drying step S50 maybe completed after the performing cutting step S60 in which theresulting product 80 is cut along a cutting line CL shown in FIGS. 7Aand 7B.

The performing cutting step S60 may be performed in various ways such asa laser cutting, an NC machining, a press blanking by using a mold, andso on.

Meanwhile, as described above with reference to FIGS. 5A and 5B, themethod of forming a pattern by using the magnetic ink and the magneticforce according to the present invention may further include UV coatingprocess as shown in FIGS. 9A and 9B. In describing the process likereference numerals are used to identify like elements throughoutdifferent drawings, thus a repeated description for the same will beomitted.

Referring to FIGS. 9A and 9B, in order to perform UV coating on thepattern, the present invention further includes UV pattern forming stepS70, performing deposition step S80, and performing coating step S90,between the performing drying step S50 and the performing cutting stepS60, which have been described with reference to FIGS. 5A and 5B.

At the UV pattern forming step S70, a UV pattern layer 40 is formed onan opposite surface of the substrate 20 undergoing the performing dryingstep S50 (that is, in the substrate, an opposite surface of the surfaceon which the print layer is formed) to realize a pattern shape. The UVpattern is formed on the opposite surface of the substrate such that itis possible to form the UV pattern layer 40 to have various designs.Forming the UV pattern layer 40 may be performed by methods known beforeapplication of the present invention such as a method of printing withUV ink and then UV curing, and a method of using a UV mold, and so on.

At the performing deposition step S80, a metal or a metal oxide isdeposited on an upper surface of the UV pattern layer 40. Accordingly,in addition to the color expression by the magnetic ink of the printlayer 30 which is an upper portion of a product, a lower portion of theproduct is provided with a thin color layer 50, and the color layer 50resulting from the deposition is seen through the magnetic ink printlayer 30 disposed above the color layer. At the performing depositionstep S80, the thin color layer 50 is formed by depositing a metal or ametal oxide on the surface of the UV pattern layer 40.

At the performing coating step S90, a protection layer 60 is formed thecolor layer 50. Here, a coating process such as UV coating, laminating,etc. is performed on the surface of the color layer 50 whereby theprotection layer 60 is formed, the protection layer 60 protecting thecolor layer 50 resulting from the deposition and shielding the colorlayer 50 from light to make the color visible at the top.

The resulting product 80 undergoing the performing coating step S90 iscompleted after the performing cutting step S60.

Meanwhile, according to the present invention, the pattern formation bythe magnetic ink may be performed not only a single time, but alsoperformed twice or more with magnetic ink including different colors ofmagnetic particles such that a multicolor pattern is formed.

That is, with respect to the process shown in FIGS. 5A and 5B of thepresent invention which forms a pattern by the magnetic ink havingmagnetic particles with chromatic color and by a magnetic force densitycontrol of the magnetic plate for controlling the distribution of themagnetic particles, the process may be performed twice as referencenumerals S41 to S52 shown in FIG. 10A. Alternatively, the process may beperformed in a plurality of times more than twice, if necessary. Asdescribed above, if the process is performed multiple times, differentcolor magnetic ink is applied at each process to form print layers andthe print layers are applied with the magnetic force, and magneticplates having various contour patterns are used. Then, as across-sectional structure of the product in FIG. 10B, the patternformation is performed in which a first print layer application and asecond print layer application are performed at different positions,that is, a coordinate position where to concentrate the magneticparticles for representing color is not superimposed on other coordinatepositions.

Furthermore, according to the present invention, when the magnetic inkparticles in an outer layer, which is the top layer, in FIG. 10B, arelight color, the color is mixed with dark color of a lower layer andexpressed on the outside. Thus, unlike the case of FIG. 10B, acoordinate where the magnetic force is concentrated is partially orentirely superimposed to express multicolor. That is, according to thepresent invention, one method among a method of forming a second printlayer on the first print layer cured at the upper portion of thesubstrate, and when it is possible that second and third print layersmay be formed in a consecutive order, a method of using the jig havingthe same magnetic plate, which is used at the magnetic pattern formationof the first print layer 30, to form each different print layer, and amethod of using jigs each having a magnetic plate configured with adifferent relief pattern is selected to perform a process such thatnon-superimposed multicolor pattern, a superimposed multicolor pattern,or a partially superimposed multicolor pattern may be formed.

Meanwhile, with respect to the process of the embodiment of the presentinvention, among the UV pattern forming step S70, the performingdeposition step S80, and the performing coating step S90 of FIG. 10A,any one of the UV pattern forming step S70 and the performing depositionstep S80 may be omitted. In addition, with respect to using of thesubstrate, the performing coating step S90 may be omitted when a coloredsynthetic resin capable of light-shielding the rear is used such that acolor pattern formed by the magnetic ink is seen clearly.

Although the specific embodiments of the present invention have beendescribed for illustrative purposes with reference to the accompanyingdrawings, and should not be construed as being restrictive. Thoseskilled in the art will appreciate that various modifications, additionsand substitutions are possible, without departing from the scope andspirit of the invention. In addition, respective exemplary embodimentsmay be independently carried out, and implemented together according toan associated relation. Accordingly, the scope of the present inventionis defined only by the accompanying claims and their equivalents ifappropriate.

What is claimed is:
 1. A method of forming a pattern by using magneticink and magnetic force, the method comprising: preparing a jig (10),which generates magnetic force (S10); applying liquid magnetic inkincluding chromatic color magnetic particles on a surface of a substrate(20) to form a print layer (30) (S20); disposing the substrate (20)configured with the print layer (30) above the jig (10) (S30); forming amagnetic pattern on the print layer (30) by applying magnetic forcegenerated from the jig (10) (S40); and drying the print layer (30)(S50), wherein the jig (10) used at the preparing of the jig (S10) isconfigured with a magnetic plate (12) having a contour portion (11)formed on an upper surface thereof in a relief pattern in order togenerate a variation of a magnetic flux density applied from a printlayer, at forming of the magnetic pattern (S40), an intensity of themagnetic force density to be applied to each coordinate position on theprint layer (30) varies according to a distance difference between asurface of the contour portion (11) and the print layer (30) whereby adistribution of the magnetic particles in the magnetic ink iscontrolled, and at the drying of the print layer (S50), the ink is driedand cured such that the distribution of the magnetic particles havingchromatic color is formed to be a desired pattern.
 2. The method ofclaim 1, wherein the magnetic particles of the magnetic ink are selectedfrom the group consisting of a ferromagnetic substance, a paramagneticsubstance, a soft ferrite, a metallic magnetic substance, a non-metallicmagnetic substance, and mixtures thereof, and one or more magneticsubstances having desired color to be expressed for the pattern are usedas the magnetic particles.
 3. The method of claim 1, further comprising:after the drying of the print layer (S50), in order to form a secondprint layer on an upper portion of the print layer (30) by performing aprocess in which the magnetic ink is applied one more time, one methodselected from using the same jig used when forming the magnetic patternof the print layer (30) and using a jig having a magnetic plateconfigured with a different relief pattern is performed.
 4. The methodof claim 1, further comprising: forming a UV pattern layer (40) on anopposite surface of the substrate (20) to realize a pattern shape (S70);depositing a metal or a metal oxide on a surface of the UV pattern layer(40) to form a thin color layer (50) thereon (S80); coating a surface ofthe color layer (50) with a protection layer (60) for covering the rearand for protection (S90); and cutting the result undergoing the coating(S90) along a desired shape of an end product (S60).
 5. A jig forimplementing the method according to claim 1, the jig comprising: amagnetic plate (12) having a contour portion (11), which is formed on anupper surface thereof in a relief pattern, and applying magnetic forceon a print layer (30), wherein an intensity of the magnetic force to beapplied to the print layer (30) varies according to a distancedifference between a surface of the contour portion (11) and the printlayer (30) such that a magnetic pattern is formed on the print layer(30).
 6. The jig of claim 5, wherein the magnetic plate (12) includes:an iron plate (12 a) configured with the contour portion (11) at anupper surface thereof, and receiving magnetic force and thus havingmagnetism; and a magnet (12 b) configured as a permanent magnet or anelectromagnet, and contacting with the iron plate (12 a) below the ironplate (12 a) and transmitting the magnetic force to the iron plate (12a).
 7. The jig of claim 5, wherein the jig (10) is provided with a spacemaintaining means to keep a space between the magnetic plate (12) andthe print layer (30).
 8. The jig of claim 7, wherein the spacemaintaining means is provided as a spacer (13), wherein the spacer (13)is configured as a column or a square frame, mounted on an edge of anupper surface of the magnetic plate (12).
 9. The apparatus of claim 8,wherein the column used as the spacer (13) is applied with a threadedbolt such that the space between the magnetic plate (12) and the printlayer (30) is adjustable in height by a bolt adjustment.